Vi = 2m/s
a= 4.5 m/s
d= 340 m
vf= ?
use this equation ... vf^2=vi<span>^2+2ad
you should get vf = 55.3
hope this helps </span>
Answer:

Explanation:
As per Doppler's effect we know that the frequency of the sound that is observed by the detector is the reflected sound
This reflected sound is given as


so we know that the beat frequency is

so we will have



so we have



Answer:
The initial speed of the bullet is
.
Explanation:
The collision between bullet and block is inelastic and let suppose that motion occurs on a horizontal surface, so that changes in gravitational potential energy can be neglected. Initially, the intial speed of the bullet-block system can be determined with the help of the Work-Energy Theorem and the Principle of Energy Conservation:


The initial speed of the bullet-block system is:

Now, the initial speed of the bullet is determined by applying the Principle of Momentum Conservation:


Answer:
Its Moving at a constant Speed of 90km/hr
You can convert this speed to Meters/Second or Change it to Km/Second(Because we need our distance in Km)
So 90km/hr x 1/60 x1/60
=90km/3600sec
v=0.025km/sec
When an Object Moves at Constant Speed... Its displacement(distance) is given by
d=vt
given v=0.025km/sec
t=1sec
d=0.025km/sec x 1sec
d=0.025km.
A wheelbarrow is a 2nd class lever. Your hands on the handles give the effort. The load inside the wheelbarrow is the resistance. The wheel is the fulcrum. When you lift up the handles, the load goes up in the same direction.